KRİYOJENİK İŞLEM UYGULANMIŞ SOĞUK İŞ TAKIM ÇELİĞİ ZIMBA İLE AISI 304 PASLANMAZ ÇELİK SAÇ MALZEMENİN İŞLENEBİLME PERFORMANSININ ARAŞTIRILMASI

Yıl 2013, Cilt: 2 Sayı: 3, 61 - 75, 01.09.2013

Yusuf Arslan İlyas Uygur Hidayet Bayraktar

Öz

In this study, the DIN 9861 pierce punchs made of AISI D3 tool steel were subjected to the cryogenic treatment and the wears of punches were examined. For this purpose, the D3 tool steel punches were treated in cryogenic at -145o C. Each punch at the end of 500th , 1500th , th , 3000th cycle, the face and flank wears of punches were obtained and measured by the optical microscopy and SEM and images. It was generally found that the cryogenic treatment had positive effects on the D3 tool steel punches with increased wear resistance. It has been observed that while increasing the burnish height caused decrease in the fracture height. Hence, it was increased the rollover and burr height on blanked part edge geometry. According to the experimental results in the blanking operation, cryogenic processes have significant effects on the blanked part edge geometry for AISI 304 austenitic stainless steel sheet.

Anahtar Kelimeler

Cryogenic treatment, Punch wear, Burr height, Blanked part edge geometry

KRİYOJENİK İŞLEM UYGULANMIŞ SOĞUK İŞ TAKIM ÇELİĞİ ZIMBA İLE AISI 304 PASLANMAZ ÇELİK SAÇ MALZEMENİN İŞLENEBİLME PERFORMANSININ ARAŞTIRILMASI

Öz

Bu çalışmada, AISI D3 takım çeliğinden yapılmış DIN 9861 zımbaya yapılan kriyojenik işlemin, zımbanın aşınma davranışına etkileri araştırılmıştır. Bu amaçla D3 takım çeliği zımba 145Co’de kriyojenik işleme tabi tutulmuştur. Her bir zımba 500, 1500, 1500, 2250, 3000 delme sonunda, delme ucu alın ve yanak aşınmaları mikroskop görüntüleri, SEM görüntüleri ve mikroyapı görüntüleri elde edilmiş ve değerlendirilmiştir. Genel olarak, kriyojenik işlem D3 takım çeliği zımbaların aşınma direncini önemli derecede artırmıştır. Kesilen pulların kesme geometrisinde kesme düzlüğü artarken kopma yüksekliğinin azaldığı aynı zamanda çapaklanmayla birlikte yuvarlanma değerinin arttığı görülmüştür. AISI 304 östenitik paslanmaz sac delme işlemlerinde elde edilen sonuçlar ışığında, kriyojenik işlemin delinmiş parça kesme geometrisini etkilediği görülmüştür.

Anahtar Kelimeler

Kriyojenik işlem, Zımba aşınması, Çapak yüksekliği, Parça kesme geometrisi

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